Automatic oiler



C. L. BUBB.

AUTOMATIC (LER- APPLICATION men SEPT-3. 1919.

Patented Apr. 20, 190.

awmwto'c anew,

CHARLES L. BUBB, 0F WILLIIAMSPOBT, PENNSYLVANIA.

AUTOMATIC OILER.

Application filed September 3, 1919.

To all whom it may concern:

Be it known that I, CHARLES L. Bonn, a citizen of the United States, residing at VVilliamsport, in the county of Lycoming and State of Pennsylvania, have 1nvented certain new and useful Improvements in Automatic Oilers, of which the following is a specification.

This invention relates to an automatic oiler or lubricator for air compressors particularly of that type designed to supply air for the train brakes and locomotive accessories on steam trains, and carried as a part of the essential equipment of every steam locomotive.

A primary object of this invention is to provide an air pump lubricator that is re liable and eflicient in use and requires only a minimum amount of attention and when the pump is not in operation it ceases to function thus saving a vast amount of lubricant that is usually wasted with devices that feed regardless of the pump operation.

Another object of this invention is to provide an air compressor lubricator that will feed the required amount of lubricant to the compressor to keep the piston and cylinder walls in perfect working order thus tending to increase the life of the compressor as well as to add to the efliciency of the train mechanism in general.

A still further object of this invention is to provide a compressor lubricator that is compact and easil manufactured at a minimum cost and will with reasonable care last the life of the compressor.

lVith the above and other objects in view this invention consists in the novel construction, combination and arrangement of parts as will be hereinafter fully pointed out, illustrated and claime It will be quite well understood by those skilled in the art to which this invention belongs, that the same is susceptible of considerable change in design without depart ing from the spirit or scope of the invention, but a preferred and thoroughly practical embodiment thereof is shown in the accompanying drawings in which Figure 1 is a View of a well known type of air compressor having my invention attached thereto.

Fig. 2 is an elevation partly in section of my improved compressor lubricator and Specification of Letters Patent.

Patented Apr. 20, 1920. Serial No. 321,395.

shows all the elements necessary for its suc cessful operation associated therewith.

Figs. 3 and 3 are respectively an elevation and an inverted plan view of the sleeve which is shown in position in Fig. 2 of the drawings.

Figs. 4 and 4 are respectively a sectional elevation and bottom plan view of the stem which is designed to coact with the sleeve shown in Fig. 3.

Fig. 5 is an elevation of the stem which is shown in Fig. 4, rotated a quarter turn to show the radlal opening therein.

Similar reference numerals refer to similar parts throughout the several figures of the drawings.

In carrying out this invention no change is contemplated in the air com ressor and the novel lubricator designated in its entirety by the numeral 10 is attached to a feed pipe 11 extending from the lubricator to the top 12 of the compressor 13 which is operated by a piston within the steam cylinder 14.

The body of the lubricator 10 is preferably circular or cup like in shape and has its lower part formed with a hexagonal portion 15, threaded stem 16, and a collar on. The body portion is further rovided with a filling cap C which is prefiirably internally threaded to permit of its being screwed down on the body 10 to prevent the waste of lubricant.

'The bodv 10 is further provided with a lubricant discharge passage 17 which extends through the neck portion 18 of the body and communicates with the enlarged and preferably threaded socket portion S that is adapted to receive the threaded nippic 19 of a tube 20 which is shown in position in Fig. 1 of the drawings. The said tube 20 is provided with a longitudinal bore 21 which registers with the opening 17 when the parts are assembled as shown -in Fig. 1, and is further provided with a radial intake opening 22 which is preferably provided with a flared mouth portion on the surface of the tube. For the purpose of screwing the tube into place the upper end thereof is provided with a plurality of notches diagonally opposite each other which receive a wrench or similar tool.

Cooperating with the tube 20 there is a. sleeve 23, the inside diameter of which iq preferably made 1/64 larger than the finished diameter of the tube 20, and its opposite ends are preferably provided with the notches 24 so that in assembling can be made whereby the lubricant may be excluded from the annular space between the tube and sleeve. This relatively restricted space between the concentric members forms a gage chamber or passage for the oil fed to the passage 17.

The operation of this lubricator may be described as follows :-Assuming that the same is properly connected to an air compressor, and the lubricant chamber properly filled with lubricant and the cap screwed down in place, the upward stroke of the air compressing piston will force compressed air up through the passage 17 and bore 21 of tube 20 and into the space above the level of the lubricant in the cut. This pressure on the top of the oil or lubricant is sufficient to force the same through notches 24 and into the space between the sleeve 23 and the tube 20. The lubricant thus forced between the sleeve and tube enters the flared mouth of the radial opening 22 and enters the bore 21 from whence it flows on the down-stroke, by gravity to the compressor chamber where a fine spray of lubricant will be formed with each stroke of the piston. The proper amount of oil necessary to lubricate an air compressor has been the subject of exhaustive experiments made by the Penna. R. R. Co. and the relative size and proportions as well as the manner of making each essential part of the above described lubricator has been determined by these tests.

With the above description of this improved lubricator its many advantages are thought to be sufliciently set forth.

I claim 1. An automatic lubricating device for air compressors including a lubricant hold ing cup having a discharge passage communicating with the compressor, a sealing cap for the cup, a tubular member fitted to the cup and communicating with the discharge passage thereof and having a radial lubricant intake opening, and a sleeve loosely telescoping with the tubular member and spaced therefrom to provide a restricted annular oil feeding passage in communication with the said radial opening, and said sleeve member having means for establishing comno mistake ing munication between the annular passage and the lubricant holding portion of the cup.

2. An automatic lubricating device for air compressors including a lubricant holding cup provided with a discharge passage communicating with the air compressor, a sealing cap for the cup, a perforate tubu lar member fitted to the cup in communication with said discharge passage, and a sleeve member loosely telescoping with the tubular member and spaced therefrom to provide a restricted oil feeding passage, said sleeve member having a lubricant passage for establishing communication between the lubricant holding portion of the cup and the said restricted passageway, said lubricant passage being out of registry with the perforate portion of the tubular member.

3.'An automatic lubricating device for air compressors including a lubricant holding cup having a discharge passage in communication with the air compressor, said passage communicating with an enlarged socket portion in the bottom of the lubricant holding chamber of the cup, a tubular member having a radial intake opening and a threaded nipple portion adapted to fit in said socket, and an external sleeve provided with notched end portions fitted over said tubular member and providing a restricted oil passage therebetween.

4. An automatic lubricatin device for air compressors including a lu ricant holding cup having a discharge passage in communication with the air compressor, a sealcap for the cup, a tubular member provided with a radial opening and having its lower end fitted to the cup in registry with the discharge passage while its upper end extends above the mean lubricant level of the lubricant chamber, and a notched sleeve telescopically fitted over said tube and spaced therefrom to provide a relatively restricted oil passage leading from the main lubricant holding chamber to the radial opening of the tube.

In testimony whereof I hereunto aifix my signature in the presence of two witnesses.

G. L. BUBB.

Witnesses:

JNo. A. B. Kine, H. H. lIAUr'r. 

